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Page 3478, results 86926 - 86950

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Technical protocol for evaluating natural attenuation of chlorinated solvents in ground water
T.H. Wiedemeier, M.A. Swanson, D.E. Moutoux, E.K. Gordon, J.T. Wilson, B.H. Wilson, D.H. Kampbell, P.E. Haas, R.N. Miller, J.E. Hansen, Francis H. Chapelle
1998, Report
This Protocol is designed to evaluate the fate in ground water of chlorinated aliphatic hydrocarbons and/or fuel hydrocarbons. Documentation of natural attenuation requires detailed site characterization. The data collected under this protocol can be used to compare the relative effectiveness of other remedial options. and natural attenuation. This protocol should...
The Chesapeake Bay bolide impact: a new view of coastal plain evolution
C. Wylie Poag
1998, Fact Sheet 049-98
A spectacular geological event took place on the Atlantic margin of North America about 35 million years ago in the late part of the Eocene Epoch. Sea level was unusually high everywhere on Earth, and the ancient shoreline of the Virginia region was somewhere in the vicinity of where Richmond...
Estimated predevelopment discharge to streams from the High Plains Aquifer in northwestern Oklahoma, southwestern Kansas, and northwestern Texas
R. R. Luckey, M.F. Becker
1998, Water-Resources Investigations Report 97-4287
A study of the High Plains aquifer in Okla homa was initiated in 1996 to: (1) provide the information needed by the Oklahoma Water Resources Board to manage the quantity of water produced from the aquifer; and (2) provide base line water-chemistry data. The approach used to meet the first...
National geochemical data base; PLUTO geochemical data base for the United States
Philip A. Baedecker, Jeffrey N. Grossman, Kim P. Buttleman
1998, Data Series 47
The PLUTO CD-ROM data base contains inorganic geothermal data obtained by the analytical laboratories of the Geologic Division of the U.S. Geological Survey (USGS) for the United States, including Hawaii and Alaska, in support of USGS program activities requiring chemical data. This CD-ROM was produced in accordance with the ISO...
Resource management of forested wetlands: Hurricane impact and recovery mapped by combining Landsat TM and NOAA AVHRR data
Elijah Ramsey III, D.K. Chappell, Dennis M. Jacobs, Sijan Sapkota, D.G. Baldwin
1998, Photogrammetric Engineering and Remote Sensing (64) 733-738
A temporal suite of NOAA Advanced Very High Resolution Radiometer (AVHRR) images, transformed into a vegetation biomass indicator, was combined with a single-date classification of Landsat Thematic Mapper (TM) to map the association between forest type and hurricane effects. Hurricane effects to the forested wetland included an abrupt decrease and...
Nonindigenous Ants at High Elevations on Mauna Kea, Hawai'i
James K. Wetterer, Paul C. Banko, Leona P. Laniawe, John W. Slotterback, Gregory J. Brenner
1998, Pacific Science (52) 228-236
Ant surveys were conducted at high elevations (1680-3140 m) on the western slope of Mauna Kea Volcano on the island of Hawai'i to detennine the extent of ant infestation in those highland communities and particularly to evaluate the potential threat of ants in the highlands to native Hawaiian species. Ants...
Tracing nitrogen sources and cycling in catchments
Carol Kendall
1998, Book chapter, Isotope tracers in catchment hydrology
This chapter focuses on the uses of isotopes to understand water chemistry.I Isotopic compositions generally cannot be interpreted successfully in the absence of other chemical and hydrologic data. The chapter focusses on uses of isotopes in tracing sources and cycling of nitrogen in the water-component of forested catchment, and on...
Overview of a workshop on screening methods for detecting potential (anti-) estrogenic/androgenic chemicals in wildlife
Gerald T. Ankley, Ellen Mihaich, Ralph G. Stahl, Donald E. Tillitt, Theo Colborn, Suzzanne McMaster, Ron Miller, John Bantle, Pamela Campbell, Nancy Denslow, Richard L. Dickerson, Leroy C. Folmar, Michael Fry, John P. Giesy, L. Earl Gray, Patrick Guiney, Thomas Hutchinson, Sean W. Kennedy, Vincent Kramer, Gerald A. LeBlanc, Monte Mayes, Alison Nimrod, Reynaldo Patino, Richard Peterson, Richard Purdy, Robert Ringer, Peter C. Thomas, Les Touart, Glen Van Der Kraak, Tim Zacharewski
1998, Environmental Toxicology and Chemistry (17) 68-87
The U.S. Congress has passed legislation requiring the U.S. Environmental Protection Agency (U.S. EPA) to develop, validate, and implement screening tests for identifying potential endocrine-disrupting chemicals within 3 years. To aid in the identification of methods suitable for this purpose, the U.S. EPA, the Chemical Manufacturers Association, and the World...
Mapping global grassland ecosystems: A comparison of four data sets
J.F. Brown
1998, Conference Paper
Grassland ecosystems have broad global geographic distribution, occurring in tropical and temperate latitudes and from near sea level to high mountain slopes. The author lists the areas by continent of the world's grasslands as depicted in four global land cover data sets. Grasslands, by definition, include regions where the dominant...
Tracing of weathering reactions and water flowpaths: A multi-isotope approach
Tomas D. Bullen, Carol Kendall
1998, Book chapter, Isotope tracers in catchment hydrology
This chapter discusses the importance of using isotopes in a complementary manner, primarily to constrain and enrich models developed from hydrologic and chemical data. Isotopes are viewed as tools for testing rather than developing hypotheses, particularly in studies operating under tight budgetary constraints. Water isotopes are very useful tools for...
Could Mars be dark and altered?
Wendy M. Calvin
1998, Geophysical Research Letters (25) 1597-1600
There is a long known dichotomy in the martian albedo, with an associated, but mostly assumed, mineralogical split as well. The bright red regions are inferred to be weathered, oxidized dust and the dark grey regions unaltered volcanic material. A number of recent analyses suggest this division is...